ADM202E/ADM1181A
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
C1+ 1
V+ 2
C1– 3
C2+ 4
C2– 5
16 V
CC
15 GND
ADM202E
14 T1
OUT
ADM1181A
13 R1
IN
TOP VIEW 12 R1
OUT
(Not to Scale)
V– 6
11 T1
IN
00066-003
T2
OUT
7
R2
IN
8
10 T2
IN
9 R2
OUT
Figure 3. Pin Configuration
Table 3. Pin Function Descriptions
Pin No.
16
2
6
15
1, 3
4, 5
10, 11
7, 14
8, 13
9, 12
Mnemonic
V
CC
V+
V−
GND
C1+, C1−
C2+, C2−
T
IN
T
OUT
R
IN
R
OUT
Description
Power Supply Input: 5 V ± 10%.
Internally Generated Positive Supply (+9 V nominal).
Internally Generated Negative Supply (−9 V nominal).
Ground Pin. Must be connected to 0 V.
External Capacitor 1 is connected between these pins. A 0.1 µF capacitor is recommended, but larger
capacitors of up to 47 µF can be used.
External Capacitor 2 is connected between these pins. A 0.1 µF capacitor is recommended, but larger
capacitors of up to 47 µF can be used.
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels.
Transmitter (Driver) Outputs. These are RS-232 signal levels (typically ±9 V).
Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is
connected on each input.
Receiver Outputs. These are CMOS output logic levels.
5V INPUT
0.1µF
10V
+5V TO +10V V
CC
16
VOLTAGE
3
C1–
V+
2
DOUBLER
1
C1+
4
C2+
5V INPUT
0.1µF
10V
0.1µF
10V
+5V TO +10V V
CC
16
VOLTAGE
3
C1–
V+
2
DOUBLER
1
C1+
4
C2+ +10V TO –10V V–
5
C2–
6
C3
0.1µF
6.3V
C4
0.1µF
10V
T1
OUT
T2
OUT
R1
IN
R2
IN
C5
0.1µF
0.1µF
10V
T1
IN
CMOS
INPUTS
T2
IN
R1
OUT
R2
OUT
+10V TO –10V V–
6
VOLTAGE
5
C2–
INVERTER
T1
T2
R1
R2
14
VOLTAGE
INVERTER
T1
T2
R1
R2
14
C4
0.1µF
10V
T1
OUT
T2
OUT
R1
IN
R2
IN
C3
0.1µF
10V
C5
0.1µF
10V
11
10
7
EIA/TIA-232
OUTPUTS
T1
IN
CMOS
INPUTS
T2
IN
R1
OUT
R2
OUT
11
10
7
EIA/TIA-232
OUTPUTS
12
13
12
13
CMOS
OUTPUTS
9
EIA/TIA-232
INPUTS
*
CMOS
OUTPUTS
8
9
8
EIA/TIA-232
INPUTS
*
GND
15
ADM202E
00066-004
GND
15
ADM1181A
00066-005
*
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
*
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 4. ADM202E Typical Operating Circuit
Figure 5. ADM1181A Typical Operating Circuit
Rev. C | Page 5 of 16
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